Large extracts from another of his works, the _Kitab ul-Asnam_, are contained in the _Khizanat ul-Adab_ (iii. 242-246) and in the geography of Yaqut (q.v.). These latter have been translated with comments by J. Wellhausen in his _Reste des arabischen Heidentums_ (2nd ed., Berlin, 1897). (G. W. T.) HISPELLUM (mod. Spello, q.v.), an ancient town of Umbria, Italy, 3 m. N. of Fulginiae, on the road between it and Perusia, 1030 ft. above sea-level. It does not appear to be mentioned before the time of Augustus, who founded a colony there (_Colonia Iulia Hispellum_) and extended its territory to the springs of the Clitumnus, which had originally belonged to the territory of Mevania. It received the name of Flavia Constans by a rescript of the emperor Constantine, a copy of which on a marble tablet is still preserved at Spello. The gate by which the town is entered is ancient and has three portrait statues above it; two other gates and a part of the city wall, built of rectangular blocks of local limestone, may still be seen, as also the ruins of what is possibly a triumphal arch (attributed to Augustus) and an amphitheatre, and perhaps of a theatre, close to the modern high-road, outside the town. (T. As.) HISSAR, a district in Central Asia, lying between 66 deg. 30' and 70 deg. E. and 39 deg. 15' and 37 deg. N. and dependent on the amir of Bokhara. It forms that part of the basin of the Amu-darya or Oxus which lies on the north side of the river, opposite the Afghan province of Balkh. The western prolongation of the Tian-shan, which divides the basin of the Zarafshan from that of the upper Amu, after rising to a height of 12,300 ft., bifurcates in 67 deg. 45' E. The main chain, the southern arm of this bifurcation, designated the Hissar range, but sometimes called also Koh-i-tau, forms the N. and N.W. boundaries of Hissar. On the W. it is wholly bounded by the desert; the Amu limits it on the S. and S.E.; and Karateghin and Darvaz complete the boundary on the E. Until 1875 it was one of the least known tracts of Central Asia. Hissar is traversed from north to south by four tributaries of the Amu, viz. the Surkhab or Vakhsh, Kafirnihan, Surkhan and Shirabad-darya, which descend from the snowy mountains to the north and form a series of fertile valleys, disposed in a fan-shape, within which lie the principal towns. In the N.W. boundary range between Khuzar and Derbent is situated the defile formerly called the Iron Gate (Caspian Gates, Bab-al-Hadid, Dar Ahanin and in Chinese T'ie-men-kuan) but now styled Buzghol-khana or the Goat-house. It was also called Kohluga, said to be a Mongol word meaning barrier. This pass is described as a deep but narrow chasm in a transverse range, whose rocks overhang and threaten to choke the tortuous and gloomy corridor (in places but five paces wide) which affords the only exit from the valley. In ancient times it was a vantage